Someone help please ?!!

Which metal exist in liquid state and can be cut with knife ?

What metric units would you use to measure the thickness of a key

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.